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Old 03-18-2023, 06:06 PM   #1
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Rebuild

Can an engine be rebuilt without being taken out ? We have an engine that needs to be rebuilt but have no yards around us to do the work. Was given a name of a diesel mechanic who they they say can do the job but was wondering if it could be done at our marina.
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Old 03-18-2023, 06:11 PM   #2
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Top ends are pretty easy. Depending on the engine sleeves and pistons can also be done in situ. Cranks and bearings can also be done but the best course may depend on how much overhead space you have.
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Old 03-18-2023, 06:35 PM   #3
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Supposedly my 6CTA Cummins can be rebuilt in place since they have cylinder liners. Engines like a Cat 3208 do not have liners so they probably need to go to a machine shop. What particular engine are we talking about?
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Old 03-18-2023, 07:23 PM   #4
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ER space to access the bottom end is critical. Usually once the head is removed there is vertical lift height available.
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Old 03-18-2023, 07:36 PM   #5
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What engine(s) do you have?
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Old 03-18-2023, 07:44 PM   #6
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Engine is an Lehman 135
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Old 03-18-2023, 08:06 PM   #7
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And what's wrong with it? I ask because it's common for people to jump to "it needs a rebuild" when a much more focused repair is all that's needed.
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Old 03-18-2023, 08:24 PM   #8
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Quote:
Originally Posted by gonesailing13 View Post
Engine is an Lehman 135
If you need to bore and sleeve the cylinders, it will need to be pulled out of the boat.

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Old 03-18-2023, 10:01 PM   #9
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And what's wrong with it? I ask because it's common for people to jump to "it needs a rebuild" when a much more focused repair is all that's needed.
Yes, have you talked to Brian at American Diesel about what is wrong with it?
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Old 03-19-2023, 08:34 AM   #10
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Would be very interested to know how you reached this conclusion.
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Old 03-19-2023, 08:41 AM   #11
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Detroit 53ís,71ís and 92ís are often rebuilt in Ď frame Ď as itís called. Heads are typically removed to machine shop for service, cylinder kits which include liners, pistons and rods are installed ( no boring ) rod and main bearings are replaced some other stuff. Iíve watched a team of Detroit mechanics jump on a ferryís 8V71 late Friday and the Ferry was back in service Sunday. Itís done all the time

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Old 03-19-2023, 09:11 AM   #12
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As to why I’m thinking rebuild, over the winter the starter shorted out and the engine started up. Not sure how long it ran but the problem was that the thru hull was closed so the engine overheated. Talked to Brian who told me to do a pressure test which I did and it’s not holding pressure. Haven’t had the chance to get back to the boat to do more investigating. One good thing is that the engine didn’t seize. Will get back to the boat in a couple weeks and see what to do next.
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Old 03-19-2023, 09:18 AM   #13
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That definitely calls for some further diagnostics, but hopefully not a full rebuild. If it's got good compression and good oil pressure at hot idle, then the bottom end is likely healthy and you can avoid pulling the engine. If it turns out to have a bad head gasket or a warped head, that should be possible to sort out with the engine still in the boat.
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Old 03-19-2023, 10:20 AM   #14
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How many hours are on it ?? Even if it does not need a complete rebuild as a result of this incident, if you think it might need it in the next couple of years it might be better to go all the way now instead of a partial rebuild now, and a full rebuild in a few years.
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Old 03-19-2023, 10:33 AM   #15
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Ok, I remember your initial post.

If you can find a good Ford mechanic, maybe he could isolate the problem to valve seats or guides versus rings. Very big difference in cost.

If I were you, I would call the local to the boat Ford tractor service manager or better yet Ford tractor regional service manager.

Tell him your problem, how he would test to find problem, and who he would hire to do it, then go hire that guy. Do it in person!

As a Cummins factory guy, someone standing in front of me got 100% of my attention.

The right guy will save you bucks, time, and become a very valuable resource for us all.

Please post everything you encounter. Your situation is somewhat unique. Please title post with Lehman 135 in title or continue this string.

Best of luck! Wish I was close.
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Old 03-19-2023, 10:44 AM   #16
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Back to original question, yes they can sometimes. Depends on how much room to work, what's the issue etc. I rebuilt a 4000lb 12 cylinder 1350hp engine in the boat. As big a task as I ever want to take on again. Also, depending on your boat, you might be able to pull it up with hoist to salon level to rebuild, again depends on what condition engine is in. Finally, based on your comments I not sure it needs rebuild. I can run my Cat without a waterpump for a long time at slow idle without even overheating. As stated above, you really need to do more testing to find out if and what the damage might be. Check for bearing pieces in the oil (drain oil totally, not just an oil analysis).If these things come back ok, engine not making noise, you probably are ok. I wouldn't just to rebuild automatically unless there are other factors such as engine hours, etc that you just want a fresh engine. Good luck
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Old 03-19-2023, 10:50 AM   #17
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What did you pressure test? Cooling system, Iím guessing, but maybe a compression test?

If the cooling system wonít hold pressure, I would guess a warped head and head gasket failure. That probably means coolant in one or more cylinders. Be cautious of hydrolock and doing more damage. A soaked cylinder may not be an issue, depending on whether rust has started to set in. Iíd first verify that the pressure leak is in the engine, not the heat exchanger or some other external part. If itís confirmed to be in the engine, then get the head of pronto and get any coolant cleaned out before you get rust. It may not be a huge job to get it working again.

BTW, I wouldnít be surprised if this is covered by your insurance.
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Old 03-19-2023, 11:04 AM   #18
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The main problem with rebuilding a F.L in place is that to re-insert the camshaft the engine must be upside down. This requires additional space and equipment.

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Old 03-19-2023, 11:48 AM   #19
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We had our FL 135 rebuilt out of the boat. The cost to remove the engine and reinstall was not that much. It took les than 4 hours to disconnect everything and get it out of the boat. And about the same to put it back. The crane cost about $300 x 2.

Good luck!
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Old 03-19-2023, 02:35 PM   #20
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Our last boat had Lehman SP225s in it. I built a crane in the salon and lifted each engine, 1 per winter, up out of the engine room and stacked it over the other engine to do work in the engine room. It took 3 of us about an hour and a half to actually do the pulling of each engine and about the same when we put them back in. I did not take them out of the salon, that would have been a huge job on that boat since there wasnít a door from the salon to the side decks.
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